This 5μm wound filter cartridge is a dedicated replacement filtration component engineered for integrated water purifiers and pure water systems, designed to perfectly match the standard filtration specifications and operational demands of household, commercial and light industrial integrated water treatment equipment. Crafted from 100% high-purity polypropylene (PP) resin via a precision spiral winding process on a food-grade rigid PP inner support core, it features an adhesive-free integral forming structure and a dense graded filtration layer optimized for 5μm precision interception. As a core replacement part for integrated water purifiers and pure water systems, its primary function is to efficiently remove fine particulate impurities from raw water, serving as a key pre-filtration link to protect subsequent precision filter elements (such as activated carbon, RO membranes and UF membranes) from blockage and damage. It is compatible with the universal filter housing specifications of mainstream integrated water purifiers and pure water systems on the market, with unified installation dimensions, easy disassembly and replacement, and no need for professional tools. Compliant with food-grade water treatment material standards, it contains no toxic additives or heavy metals, ensuring no secondary pollution to filtered water and meeting the safety requirements of drinking water purification. This cartridge is a cost-effective, high-reliability replacement part that guarantees the stable filtration efficiency and long-term operation of integrated water purifiers and pure water systems.

This filter cartridge is manufactured with a fixed 5μm nominal filtration precision, a core specification tailored for the pre-filtration demand of integrated water purifiers and pure water systems. Through a high-precision winding process and uniform pore size distribution of the PP filtration layer, it can efficiently intercept over 98% of solid particulate impurities with a particle size of 5μm and above in raw water, including fine silt, clay particles, rust residues from water pipelines, suspended solids, colloidal particulates, tiny sand grains and mechanical impurities generated during water transportation and storage. The 5μm precision is a scientific choice for the pre-filtration link of integrated water treatment systems: it effectively removes harmful fine impurities that may block or scratch subsequent precision filter elements, while avoiding excessive flux loss caused by overly fine filtration precision, thus balancing impurity removal efficiency and water production flow of the purifier system. This fixed precision is consistent with the standard pre-filtration specifications of mainstream integrated water purifiers and pure water systems, ensuring perfect matching and direct replacement without adjusting the equipment structure.

Under the standard operating conditions of 25℃ ambient temperature and 0.2MPa inlet pressure (matching the working pressure of household and commercial integrated water purifiers), the nominal flux of this 5μm wound filter cartridge is calibrated according to the universal physical specifications of water purifier replacement parts: the 10-inch model (the most commonly used) achieves 8-12 L/min, 20-inch model 15-20 L/min, and 30-inch model 25-35 L/min. As a pre-filtration replacement cartridge for integrated water systems, its flux design is fully adapted to the water production demand of household (daily water output 200-500L) and commercial small-flow (daily water output 1-3 tons) pure water systems, ensuring sufficient and stable raw water supply for the subsequent filtration links. The optimized internal flow channel structure of the cartridge minimizes water flow resistance under 5μm precision, maintaining a stable flux during the service life and avoiding the problem of reduced water output of the integrated water purifier caused by flux attenuation. For multi-core filter housing configurations in commercial integrated pure water systems, the total flux can be linearly increased by adding cartridges, adapting to different water production demands.

As a physical pre-filtration replacement component dedicated to particulate impurity interception for integrated water purifiers and pure water systems, this 5μm wound filter cartridge is only designed for particle size-based removal of insoluble solid contaminants and has no ion separation, desalination or salt rejection functional design. Therefore, it has no salt rejection rate index. All dissolved inorganic salts, mineral ions, small molecule soluble substances and trace beneficial mineral components in raw water can pass through the cartridge body smoothly and enter the subsequent filtration links (such as RO membranes, activated carbon), where the professional desalination, dechlorination and purification processes are completed. This functional positioning is highly consistent with the role of the pre-filtration cartridge in integrated water treatment systems: focusing on removing particulate impurities that affect the operation of subsequent precision filter elements, without interfering with the core purification functions (such as desalination and dechlorination) of the water purifier, and ensuring the normal play of the system’s water purification performance.

The initial pressure drop of a new 5μm wound filter cartridge under the standard nominal flux and 25℃ operating temperature is ≤0.025MPa for all specifications, an ultra-low pressure loss design optimized for the low-working-pressure characteristics of integrated water purifiers and pure water systems. This initial pressure drop is far lower than the pressure bearing limit of household/commercial water purifier filter housings and water pumps, ensuring minimal pressure loss of raw water in the pre-filtration link and avoiding the increase of water pump load and energy consumption of the integrated system. With the continuous operation of the water purifier, 5μm and above fine impurities are continuously intercepted and accumulated on the surface and inside of the filtration layer, leading to a gradual and slow rise in pressure drop. The recommended maximum operating pressure drop of this cartridge is 0.1MPa for all specifications; when the pressure drop reaches this value, the cartridge must be replaced in time. Delayed replacement will cause excessive pressure loss in the water purifier system, leading to reduced water output, increased noise of the water pump, and even the risk of filter housing leakage due to excessive pressure, while also accelerating the fouling of subsequent precision filter elements.

This 5μm wound filter cartridge adopts a pure physical filtration mechanism based on particle size interception, whose core working principle is to capture solid particulate impurities according to their actual physical size in raw water, rather than separating substances based on molecular weight or molecular size—this is fundamentally different from ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membranes that are equipped with specific Molecular Weight Cutoff (MWCO) indexes in integrated pure water systems. Therefore, this replacement filter cartridge has no specific MWCO index. Its interception effect is only targeted at insoluble solid particulates with a particle size of 5μm and above; macromolecular organic substances, soluble colloids and other dissolved substances in raw water can pass through the cartridge body smoothly as long as their actual particle size is smaller than 5μm, and then enter the subsequent membrane filtration links for professional molecular weight-based separation and purification. This design fully meets the functional requirements of the pre-filtration replacement cartridge in integrated water systems, which only needs to remove physical particulate impurities without participating in the molecular level purification of water.

The effective PP filtration layer thickness of this 5μm wound filter cartridge is optimized according to the universal specifications of integrated water purifier replacement parts and the demand of 5μm precision interception: the 10-inch model (mainstream specification) features a filtration layer of 6-8mm, 20-inch model 9-12mm, and 30-inch model 12-15mm. The total outer diameter of all specifications is the industry universal 63mm/70mm for water purifier filter cartridges, perfectly matching the internal size of standard filter housings of integrated water purifiers and pure water systems, ensuring tight fit and no water short-circuit during installation. The moderately thickened effective filtration layer is the key to ensuring stable 5μm filtration precision and sufficient impurity holding capacity: it forms a multi-layer graded interception structure, which can step by step intercept fine impurities of different particle sizes, avoiding rapid blockage of the filtration layer, and at the same time ensuring that the cartridge can store a certain amount of impurities during the service life, delaying the rise of pressure drop. The inner support core is made of food-grade rigid PP material with a thickness of 3-4mm (matching the cartridge specification), with excellent structural stability, which can withstand the maximum working pressure of 0.4MPa of integrated water purifiers without deformation or rupture, ensuring no precision loss of the filtration layer during the operation of the water purifier system.

The recommended standard replacement cycle of this 5μm wound filter cartridge is determined according to the application scenario (household/commercial) and the raw water quality, matching the maintenance habits of integrated water purifiers and pure water systems: for the 10-inch model (household integrated water purifiers/pure water machines) with tap water as raw water (turbidity ≤5 NTU, suspended solids ≤10 mg/L), the standard replacement cycle is 1-3 months (the mainstream maintenance cycle of household water purifier pre-filtration cartridges); for the 20/30-inch models (commercial small-flow integrated pure water systems) used in offices, small shops and communities (daily water output 1-3 tons), the standard cycle is 2-4 months. The actual replacement cycle is closely related to the raw water quality: for raw water with high turbidity (NTU＞5) and serious pipeline rust (such as old residential areas), the cycle is shortened to 1 month; for raw water with low turbidity (NTU＜3) and well-maintained pipelines (new residential areas), the cycle can be appropriately extended to 3-4 months. In addition, in accordance with the maintenance specifications of integrated water purifiers, the cartridge must be replaced immediately once the water output of the system is significantly reduced or the pressure drop reaches 0.1MPa, regardless of the actual use time, to ensure the normal filtration efficiency of the whole system and protect the subsequent high-value precision filter elements.

This 5μm wound filter cartridge has a number of professional performance features adapted to be a replacement part for integrated water purifiers and pure water systems, with the core advantages of matching, safety and ease of use: 1. Fixed 5μm precision for perfect matching: The standard 5μm filtration precision is consistent with the pre-filtration specifications of mainstream integrated water purifiers and pure water systems on the market, realizing direct replacement without equipment modification, and ensuring the filtration efficiency of the whole system; 2. 100% food-grade PP raw material: Adopts food-grade high-purity PP resin complying with national drinking water standards, free of toxic additives, plasticizers and heavy metals, no harmful substance dissolution in water, ensuring the safety of drinking water purified by the integrated system; 3. Adhesive-free integral forming: No adhesives, binders or glues are used in the whole production process, avoiding the dissolution of organic solvents into raw water and secondary pollution, while ensuring the structural firmness of the cartridge and no delamination or cracking during the operation of the water purifier; 4. Ultra-low initial pressure drop: Optimized flow channel design and uniform filtration layer density ensure ultra-low initial pressure drop (≤0.025MPa), adapting to the low-working-pressure characteristics of integrated water purifiers, reducing water pump load and energy consumption; 5. Universal specification for easy replacement: Adopts the industry universal 10/20/30-inch length and 63mm/70mm outer diameter, matching all standard filter housings of integrated water purifiers, with simple disassembly and replacement, no need for professional tools, suitable for self-maintenance of household users and quick replacement of commercial equipment; 6. Sufficient impurity holding capacity: Moderately thickened graded filtration layer provides a certain amount of impurity storage space, delaying the rise of pressure drop and reducing the replacement frequency, saving the maintenance cost of integrated water treatment systems; 7. Good chemical stability: Acid and alkali resistant in the pH range of 2-12, corrosion resistant to residual chlorine and trace water treatment agents in tap water, with long service life in the raw water environment of drinking water purification; 8. Eco-friendly and recyclable: The whole cartridge is made of single PP material, easy to recycle and harmless disposal, in line with the green environmental protection requirements of drinking water treatment equipment.

This 5μm wound filter cartridge is a dedicated replacement pre-filtration component for integrated water purifiers and pure water systems, and its core application fields cover all household, commercial and light industrial scenarios equipped with integrated water treatment equipment that requires standard 5μm pre-filtration replacement parts: 1. Household integrated water purifiers: As a replacement pre-filtration cartridge for household under-sink pure water machines, kitchen integrated water purifiers, desktop water purifiers and central water purification small systems, the most mainstream 10-inch model is widely used in family drinking water purification; 2. Commercial small-flow pure water systems: Used as a replacement part for integrated pure water machines in offices, shopping malls, community water vending machines, small restaurants and barber shops, matching 20/30-inch models to meet the small-flow commercial drinking water demand; 3. Light industrial integrated water treatment equipment: Applied to the pre-filtration replacement of small integrated pure water systems in small food processing workshops, beverage stores and cosmetic studios, complying with food-grade material standards and ensuring the safety of production and processing water; 4. Public facility drinking water equipment: As a replacement cartridge for integrated water purifiers in schools, kindergartens, hospitals and community activity centers, providing safe and clean drinking water for the public and facilitating regular maintenance of the equipment; 5. Mobile integrated water purifiers: Used for the pre-filtration replacement of mobile water purifier equipment in outdoor operations, field camps and emergency drinking water supply, with the advantages of easy replacement and stable filtration performance; 6. Domestic water purification equipment: Applied to the pre-filtration replacement of integrated water purifiers for domestic water in hotels, guesthouses and rental apartments, improving the cleanliness of domestic water and protecting the subsequent precision filter elements of the equipment.

In summary, this 5μm wound filter cartridge is a high-performance, cost-effective dedicated replacement pre-filtration component specially engineered for integrated water purifiers and pure water systems, and is an essential core replacement part to ensure the stable operation, high filtration efficiency and drinking water safety of integrated water treatment equipment. Its core design of fixed 5μm filtration precision and industry universal specifications perfectly matches the pre-filtration demand and replacement standards of mainstream integrated water purifiers and pure water systems on the market, realizing direct replacement without equipment modification and greatly improving the convenience of equipment maintenance. Crafted from 100% food-grade high-purity PP resin with an adhesive-free integral forming process, it strictly complies with drinking water safety standards, ensures no secondary pollution to filtered water, and lays a solid foundation for the subsequent purification links of the integrated system. With the advantages of ultra-low initial pressure drop, sufficient impurity holding capacity, good chemical stability and easy replacement, it is fully adapted to the operating characteristics of household and commercial integrated water treatment systems, reducing the equipment maintenance cost and energy consumption while effectively removing fine particulate impurities in raw water and protecting the subsequent high-value precision filter elements (RO membranes, UF membranes, activated carbon) from blockage and damage. As a standard replacement part for the pre-filtration link of integrated water purifiers and pure water systems, it has the characteristics of strong compatibility, high reliability and high cost performance, and is the first choice for the pre-filtration replacement of household, commercial and light industrial integrated water treatment equipment with drinking water purification demands.

The matching related products of this 5μm wound filter cartridge are all core filter elements, supporting parts and complete sets of equipment of integrated water purifiers and pure water systems, forming a complete replacement and supporting product system for drinking water purification equipment: 1. Water purifier precision filter elements (matching replacement): 1μm PP melt-blown filter cartridges, granular activated carbon (GAC) filter cartridges, compressed activated carbon (CTO) filter cartridges, RO membranes and UF membranes of the same 10/20/30-inch specifications, the subsequent core filter elements of integrated water purifiers, matching this 5μm pre-filtration cartridge for whole-set replacement; 2. Standard water purifier filter housings: Food-grade PP plastic filter housings (10/20/30-inch) of the industry universal 63mm/70mm inner diameter, the special supporting equipment for this cartridge, with pressure relief valves and filter bottle wrenches for easy installation and replacement; 3. Water purifier supporting accessories: Food-grade silicone gaskets, filter bottle sealing rings, quick connectors, PE water pipes and water pressure gauges, the necessary installation and sealing parts for replacing this cartridge, ensuring the tightness and normal operation of the filter housing; 4. Water purifier functional accessories: Tap water pre-filters (Y-type), water pressure regulators and residual chlorine test kits, matching with this cartridge to optimize the raw water quality of integrated water purifiers and monitor the water purification effect; 5. Same series PP wound filter cartridges: 10μm/20μm PP wound filter cartridges of the same specifications, alternative pre-filtration replacement parts for integrated water purifiers used in raw water with different turbidity, adapting to different water quality conditions; 6. Water purifier maintenance tools: Filter bottle wrenches, cartridge pullers and pipe cutters, special tools for replacing this cartridge and other filter elements of integrated water purifiers, facilitating household self-maintenance and commercial quick maintenance; 7. Integrated water purifier complete sets: Household under-sink pure water machines, commercial small-flow integrated pure water systems and desktop water purifiers equipped with this 5μm pre-filtration cartridge, providing turnkey drinking water purification solutions for different scenarios; 8. Water purifier consumables combination sets: Whole-set consumables combinations including this 5μm wound filter cartridge, activated carbon filter cartridges and RO membranes, designed for the regular maintenance of integrated water purifiers, with cost advantages and convenient one-stop replacement.